uint16 device_model
uint8  status_selector

uint32 status_flags

uint16 system_state
uint32 system_timer_ms

uint8 gps_power_on

uint32 num_gps_pps_triggers
uint32 last_gps_pps_trigger_ms

uint8 imu_stream_enabled
uint8 gps_stream_enabled
uint8 filter_stream_enabled

uint32 imu_dropped_packets
uint32 gps_dropped_packets
uint32 filter_dropped_packets

uint32 com1_port_bytes_written
uint32 com1_port_bytes_read
uint32 com1_port_write_overruns
uint32 com1_port_read_overruns

uint32 imu_parser_errors
uint32 imu_message_count
uint32 imu_last_message_ms

uint32 gps_parser_errors
uint32 gps_message_count
uint32 gps_last_message_ms
